the only mark on the barrel is 18.5 which I believe is the bore measurement, can't put it on paper, since when I got it home found it has a cracked trigger hammer, have one on order from S&W supply, can't shoot it till later this week.

as an old man, I am not very worried about resale value,[paid way to much already] I'm more interested in modifying it to a point that I can shoot it , extra full is way to tight, will probably send it to Briley and have it measured and re bored. don't want to spend the extra money to have it bored for choke tubes.